问一个小白的问题，log_buffer和 Redo Buffers 有什么区别啊
SYS@ test>show parameter log_buffer
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_buffer integer 4952064
SYS@ test>select * from v$sgainfo;
NAME BYTES RES
-------------------------------- ---------- ---
Fixed SGA Size 1339824 No
Redo Buffers 5132288 No
Buffer Cache Size 209715200 Yes
Shared Pool Size 314572800 Yes
Large Pool Size 8388608 Yes
Java Pool Size 4194304 Yes
Streams Pool Size 8388608 Yes
Shared IO Pool Size 0 Yes
Granule Size 4194304 No
Maximum SGA Size 849530880 No
Startup overhead in Shared Pool 58720256 No
Free SGA Memory Available 297795584
12 rows selected.